Microsoft continues to expand model choice in Copilot, and Grok from SpaceXAI is the latest addition.
Grok is now rolling out in preview through the Microsoft Frontier program, initially within Copilot experiences in Word, Excel and PowerPoint.
I thought this was worth sharing as it is another sign of how Copilot is gradually evolving into a multi-model experience, giving organizations access to models from different providers depending on their needs.
There are a few important things to know about the current preview.
Grok is disabled by default, and Microsoft 365 administrators need to explicitly enable access to SpaceXAI models. Access can also be scoped to specific users or Microsoft Entra ID security groups.
There is also an important regional limitation — Grok is currently not available to Frontier customers in the EU, EFTA or UK during the preview.
Microsoft has also added SpaceXAI to its Online Services Subprocessor List for these supported Copilot experiences. For enterprise customers, this is worth noting alongside Microsoft's guidance on how data is processed when using third-party models.
This is where the broader multi-model story becomes interesting. Adding more model choices isn't only about capability — organizations also need to understand regional availability, data processing, contractual requirements and governance for each model provider.
Grok isn't entirely new to Microsoft's AI ecosystem either. SpaceXAI models have already started appearing across Microsoft's broader AI platform and Copilot Studio. What is interesting now is seeing Grok move closer to everyday productivity experiences such as Word, Excel and PowerPoint.
For me, the bigger takeaway is the direction Microsoft is taking with Copilot.
More model choice also means more attention to model governance.
As organizations get access to models from different providers, understanding which models are enabled, who can use them, where they are available and how enterprise data is handled will become increasingly important.
For now, Grok remains a Frontier preview with admin opt-in and no availability in the EU, EFTA or UK.
Worth keeping an eye on as Microsoft's multi-model Copilot strategy continues to evolve.
References
Microsoft – Expanding model choice in Copilot with Grok
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